Home / 2,687.51-4,031.91-1,126.65

Finding the Fourth Proportional to 2,687.51, 4,031.91 and 1,126.65

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Solution

The fourth proportional to 2,687.51, 4,031.91 and 1,126.65 is: 1,690.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,687.51 : 4,031.91 = 1,126.65 : x
  2. Step 2: Convert to fraction form
    2,687.51/4,031.91 = 1,126.65/x
  3. Step 3: Cross multiply
    2,687.51x = 4,031.91 × 1,126.65
  4. Step 4: Simplify right side
    2,687.51x = 4,542,551.40
  5. Step 5: Solve for x
    x = 4,542,551.40/2,687.51
  6. Step 6: Final answer
    x = 1,690.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.